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Air Lockers
Posted: Mon Apr 11, 2005 10:45 pm
by Maggot4x4
Hi Guys, looked in the tech section but couldn't find an answer. Will an RD78 fit a GQ front diff. If not, what are the differences between the RD78 and an RD09?
Cheers
Posted: Tue Apr 12, 2005 12:17 pm
by turps
Also since we asking similar questions how about what needs to be done to a RD09 (GQ) to make it fit in the same spot as a RD78A (GU).
Posted: Tue Apr 12, 2005 12:33 pm
by bazzle
I think this is the difference.
The RD09 has a thrust block and a long pinion shaft thru the middle. The RD78A has a hollow centre.
If you remove the thrust block it will allow more axle penetration. You will still need to ensure (by witness) that the axle ends dont touch long cross shaft. Axle ends can be trimmed on a Brobo etc by 6mm or so.
No resp taken, just the way I see it from the pictures in an ARB diff book.
Bazzle
Posted: Tue Apr 12, 2005 5:43 pm
by Maggot4x4
I called ARB today to find out. They said all that is required to make the RD78A fit a GQ was a steel rod 32.5mm dia by 31mm long. They suggest making them out of harden steel. As for the other way around, they don't recommend it.
cheers,
Posted: Tue Apr 12, 2005 7:03 pm
by turps
Maggot4x4 wrote:I called ARB today to find out. They said all that is required to make the RD78A fit a GQ was a steel rod 32.5mm dia by 31mm long. They suggest making them out of harden steel. As for the other way around, they don't recommend it.
cheers,
Bugger that makes for a very expensive diff swap then.
Posted: Thu Apr 14, 2005 2:40 pm
by Maggot4x4
turps wrote:Maggot4x4 wrote:I called ARB today to find out. They said all that is required to make the RD78A fit a GQ was a steel rod 32.5mm dia by 31mm long. They suggest making them out of harden steel. As for the other way around, they don't recommend it.
cheers,
Bugger that makes for a very expensive diff swap then.
Wanna sell your RD09?